Dartboard rotating apparatus

ABSTRACT

The present invention relates to a dartboard rotating apparatus that makes a rear dartboard and a front dartboard rotated smoothly while making them not separated due to vibration occurring at the rotation of the front dartboard. The front dartboard  30  includes: a peripheral projection  31  being protruded at the periphery of the back of the front dartboard  30;  a central axis  33  being protruded at the center of the front dartboard  30  to conform to the center of the circumferential recess  24  and guiding rotation; an inner stepped portion  37  being stepped at the inner diameter of the central axis  33  to a predetermined depth; and an engaging recess  35  being formed at the center of the central axis  33  for engaging the screw spike  50.  The connection axis  40  formed with a plurality of stepped portions includes: a first stepped portion  42  being inserted into the inner stepped portion  37  of the central axis  33;  a projection supporting portion  44  being supported by the inner diameter portion  22  of the rear dartboard  20;  a second stepped portion  46  being stepped to be coupled to the inner diameter portion of the ball bearing  60;  and a through hole  48  being formed at the center so that the screw spike  50  can be passed through.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a dartboard rotating apparatus,and more particularly, to a dartboard rotating apparatus that makes arear dartboard and a front dartboard rotated smoothly while making themnot separated due to vibration occurring at the rotation of the frontdartboard.

[0003] 2. Description of the Related Art

[0004] Generally, as illustrated in FIG. 1, a rotary dartboard has sucha structure that a through hole is formed at the center of a ballbearing 10 contained in a circumferential recess 4 formed at the centerof the front of a rear dartboard 1, a central axis 3 formed at thecenter of the back of the front dartboard 2, the through hole and thecentral axis 3 are interconnected, and the central axis 3 of the frontdartboard 2 is directly connected to the ball bearing 10 by engaging awasher 7 to an engaging recess 9 formed at the back of the central axisby a screw spike 6. This structure is problematic in that the screwspike 6 engaged to the engaging recess 9 is loosed by the vibrationoccurred at the rotation of the front dartboard 2, and thusly the frontdartboard 2 is separated from the rear dartboard 1 or the vibrationphenomenon becomes more critical.

[0005] In addition, as illustrated in the drawing, since the height ofthe central axis 3 is larger than that of the inner circumference of thefront dartboard 2, it is not easy to load and store the front dartboard2 in a disassembled state prior to assembly and production.

SUMMARY OF THE INVENTION

[0006] It is, therefore, an object of the present invention to provide adartboard rotating apparatus which can prevent the separation of a frontdartboard from a rear dartboard and the occurrence of vibration at therotation of the front dartboard while being rotated smoothly and whichcan easily load and store the front dartboard in a disassembled state.

[0007] To achieve the above object, the present invention provides adartboard rotating apparatus, comprising: a rear dartboard being formedat the back of a dartboard for performing a supporting operation; afront dartboard being rotatably coupled to the front of the reardartboard and being formed with various designs for a dart game; aconnection axis being formed at the center of the rear dartboard andfront dartboard and supporting them while connecting them to berotatable; a ball bearing being disposed at one end of the lateral sideof the connection axis and rotating the front dartboard; and a screwspike supportingly engaged by a washer so that the connection axis andthe ball bearing cannot be pulled out,

[0008] wherein the rear dartboard comprises: an inner diameter portionbeing formed to be passed through the center of the rear dartboard; acircumferential recess being formed at the back of the rear dartboardfor mounting the ball bearing thereto; and latch jaws supporting theball bearing so that it cannot be pulled out,

[0009] wherein the front dartboard comprises: a peripheral projectionbeing protruded at the periphery of the back of the front dartboard; acentral axis being protruded at the center of the front dartboard toconform to the center of the circumferential recess and guidingrotation; an inner stepped portion being stepped at the inner diameterof the central axis to a predetermined depth; and an engaging recessbeing formed at the center of the central axis for engaging the screwspike, and

[0010] wherein the connection axis formed with a plurality of steppedportions includes: a first stepped portion being inserted into the innerstepped portion of the central axis; a projection supporting portionbeing supported by the inner diameter portion of the rear dartboard; asecond stepped portion being stepped to be coupled to the inner diameterportion of the ball bearing; and a through hole being formed at thecenter so that the screw spike can be passed through.

[0011] In addition, the height of the central axis is smaller than thatof the peripheral projection formed at the periphery of the frontdartboard and the rear dartboard is formed in a rectangular shape.

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above objects, features and advantages of the presentinvention will become more apparent from the following detaileddescription when taken in conjunction with the accompanying drawings, inwhich:

[0013]FIG. 1 is a side cross-sectional view illustrating a conventionaldartboard rotating apparatus; and

[0014]FIG. 2 is a side cross-sectional view illustrating a dartboardrotating apparatus in accordance with the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0015] A preferred embodiment of the present invention will now bedescribed with reference to the accompanying drawings.

[0016]FIG. 2 is a side cross-sectional view illustrating a dartboard inaccordance with the present invention. Reference numeral 100 representsa dartboard with the rotating apparatus of the invention. The dartboard100 includes: a rear dartboard 20 performing a supporting operation incontact with a wall if it is hung on the wall by a user; a frontdartboard 30 being rotatably coupled to the front of the rear dartboard20 and being formed with various designs for a dart game; a connectionaxis 40 being formed at the center of the rear dartboard 20 and frontdartboard 30 and supporting them while connecting them to be rotatable;a ball bearing 60 being disposed at one end of the lateral side of theconnection axis 40 and rotating the front dartboard 30; and a screwspike 50 supportingly engaged by a washer 52 so that the connection axis40 and the ball bearing 60 cannot be pulled out.

[0017] The rear dartboard 20 includes: an inner diameter portion 22being formed to be passed through the center of the rear dartboard 20; acircumferential recess 24 being formed at the back of the rear dartboard20 for mounting the ball bearing 60 thereto; and latch jaws 25 and 25 asupporting the ball bearing 60 so that it cannot be pulled out.

[0018] That is, in a case that the ball bearing 60 is inserted into thecircumferential recess 24 and it is pushed by a predetermined externalforce, since the outer diameter of the ball bearing 60 is larger thanthe inner diameter of the latch jaws 25 and 25 a by 1˜3 mm, the ballbearing is inserted into the circumferential recess 24 while pushing thelatch jaws 25 and 25 a and thereafter it is not pulled out naturally.

[0019] In addition, the front dartboard 30 includes: a peripheralprojection 31 being protruded at the periphery of the back of the frontdartboard 30 for bearing an external force; a central axis 33 beingprotruded at the center of the front dartboard 30 to conform to thecenter of the circumferential recess 24; an inner stepped portion 37being stepped at the inner diameter of the central axis 33 to apredetermined depth; and an engaging recess 35 being formed at thecenter of the central axis 33 for engaging the screw spike 50.

[0020] Since the height of the central axis 33 of the front dartboard 30is smaller than that of the peripheral projection 31, the frontdartboard 30 can be managed efficiently in manufacturing, storing anddelivering it, thereby reducing cost.

[0021] In addition, the connection axis 40 being connected between therear dartboard 20 and the front dartboard 30 for acting as a medium isformed with a plurality of stepped portions. The connection axis 40includes: a first stepped portion 42 being inserted into the innerstepped portion 37 of the central axis 33; a projection supportingportion 44 being supported by the inner diameter portion 22 of the reardartboard 20; a second stepped portion 46 being stepped to be coupled tothe inner diameter portion of the ball bearing 60; and a through hole 48being formed at the center so that the screw spike can be passedthrough.

[0022] The connection axis 40 of the above-described embodiment isnothing but the one provided for convenience of description. Thus, thepresent invention is not limited to this embodiment. For example, thelength of the first stepped portion 42, projection supporting portion 44and second stepped portion 46 can be adjusted according to the state ofuse.

[0023] Such a dartboard rotating apparatus is, as illustrated in FIG. 2,not applied only to a rotary front dartboard consisting of a reardartboard 20 and front dartboard 30 of a round shape, but also appliedto a rotary front dartboard consisting of a rear dartboard 20 and frontdartboard 30 in a square, rectangular or ellipse shape.

[0024] As described above, in the dartboard rotating apparatus of theinvention, since the connection axis serves as a bushing in a case thatthe ball bearing contained in the circumferential recess of the centerof the rear dartboard constituting the rotary dartboard of the presentinvention is connected with the central axis by the connection axis forrotation, the rear dartboard is smoothly rotated to prevent the frontdartboard from being separated from the rear dartboard or preventvibration. In addition, the dartboard rotating apparatus can be usedsemi-permanently and it can improve the loadability, storability andproductivity since the height of the central axis is smaller than thatof the peripheral projection of the front dartboard.

What is claimed is:
 1. A dartboard rotating apparatus, comprising: arear dartboard being formed at the back of a dartboard for performing asupporting operation; a front dartboard being rotatably coupled to thefront of the rear dartboard and being formed with various designs for adart game; a connection axis being formed at the center of the reardartboard and front dartboard and supporting them while connecting themto be rotatable; a ball bearing being disposed at one end of the lateralside of the connection axis and rotating the front dartboard; and ascrew spike supportingly engaged by a washer so that the connection axisand the ball bearing cannot be pulled out, wherein the rear dartboardcomprises: an inner diameter portion being formed to be passed throughthe center of the rear dartboard; a circumferential recess being formedat the back of the rear dartboard for mounting the ball bearing thereto;and latch jaws supporting the ball bearing so that it cannot be pulledout, wherein the front dartboard comprises: a peripheral projectionbeing protruded at the periphery of the back of the front dartboard; acentral axis being protruded at the center of the front dartboard toconform to the center of the circumferential recess and guidingrotation; an inner stepped portion being stepped at the inner diameterof the central axis to a predetermined depth; and an engaging recessbeing formed at the center of the central axis for engaging the screwspike, and wherein the connection axis formed with a plurality ofstepped portions includes: a first stepped portion being inserted intothe inner stepped portion of the central axis; a projection supportingportion being supported by the inner diameter portion of the reardartboard; a second stepped portion being stepped to be coupled to theinner diameter portion of the ball bearing; and a through hole beingformed at the center so that the screw spike can be passed through. 2.The apparatus of claim 1, wherein the height of the central axis issmaller than that of the peripheral projection formed at the peripheryof the front dartboard.
 3. The apparatus of claim 1, wherein the reardartboard is formed in a rectangular shape.